Which action is produced by the gastrocnemius?

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Multiple Choice

Which action is produced by the gastrocnemius?

Explanation:
The gastrocnemius is a two‑joint muscle that crosses both the knee and ankle. When it contracts, it helps bend the knee (knee flexion) and also pushes the foot downward at the ankle (ankle plantarflexion) because it inserts into the calcaneus via the Achilles tendon. It does not extend the knee, nor does it dorsiflex the ankle or invert the foot—those actions come from other muscles. So the action produced is flexing the knee and plantarflexing the ankle.

The gastrocnemius is a two‑joint muscle that crosses both the knee and ankle. When it contracts, it helps bend the knee (knee flexion) and also pushes the foot downward at the ankle (ankle plantarflexion) because it inserts into the calcaneus via the Achilles tendon. It does not extend the knee, nor does it dorsiflex the ankle or invert the foot—those actions come from other muscles. So the action produced is flexing the knee and plantarflexing the ankle.

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